If you detect shortcomings (or an auditor does so) in your Reg. E error resolution compliance, about all you can do is determine why the problem exists, and then take action (training, retraining, process changes, etc.) to correct the problem for the future.
To the best of my knowledge, regulators aren't trying to make thumbs up or down decisions on claims for you. They are concerned with the process. If you get called to task for an outcome, it's more likely to be in the form of a claim from your customer, and it could involve a courtroom.
John S. Burnett
Fighting for Compliance since 1976
Bankers' Threads User #8